Importance

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Abstract

A wireless authentication system to control an operating state of a node being a computer, door control mechanism or any muti-state product based on the proximity of an authorized user to the node. The wireless authentication system comprises a security device implemented within the computer and a user authentication token ('token') in possession of the authorized user. A Challenge/Response protocol is configured between the security device and the token. The first successful Challenge/Response message exchange between the security device and the token places the node in an operational state allowing the authorized user access to the contents and/or networked resources of the node. Later Challenge/Response message exchanges are set to occur periodically to check whether the authorized user possessing the token has left the node unattended thereby causing the node to be placed in a non-operational state.

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First Claim